Friday, June 11, 2010

When Garbage Doesn't Die

When Garbage Doesn't Die

How plastic debris is contaminating the world's oceans.
Editor's Note: Water Planet is an open forum for leading nonprofit marine conservation groups and advocates to sound off on environmental issues. Opinions expressed here are solely those of the author and do not necessarily represent the views of Divers Alert Network®.

Continental masses cause ocean currents to develop circular patterns, known as gyres, in each of the three major ocean basins. The North Pacific Gyre, formed by the southern currents off the coast of North America and the northern currents off the coast of Asia, is the world's largest.

As increasing amounts of plastic trash and debris find their way to sea, this natural phenomenon has become an area of concern. Over time, all floating waste from land migrates to gyres, where it remains trapped — out of sight, out of mind, but not without adverse environmental consequences. The North Pacific Gyre is home to what many are now calling the Eastern Pacific Garbage Patch, a concentration of plastic debris estimated to be 30 feet deep and spread out over an area twice the size of Texas.

The problem: Plastics don't break down naturally. Instead, they undergo a process of photodegradation, in which sunlight causes the material to disintegrate into increasingly smaller pieces. Water samples taken from the garbage patch show stratified layers of plastic bits, including a cloudy mass of plankton-sized particles. "The gyre contains plastic in all states of degradation," says Capt. Charles Moore, who first discovered the problem. "It all combines in a sort of soup."

His was a rude awakening back in 1997. During a yacht race from Southern California to Hawaii, Moore veered off a normal heading and saw an ocean he barely recognized. He notes that within the gyre, "Every time I came on deck to survey the horizon, I saw a soap bottle, bottle cap or a shard of plastic waste bobbing by. Here I was in the middle of the ocean, and there was nowhere I could go to avoid the plastic."

It was his personal wake-up call, and the Algalita Marine Research Foundation was born to address the perils of plastics pollution. His operational premise: "Industries reaping large profits from the creation of these plastic materials should be tasked with the challenge of recycling."

While large pieces of plastic debris are a well-documented threat to sea birds and turtles, the new concern is what is happening beneath the water's surface. Researchers worry that marine animals are mistaking the smallest plastic bits for plankton. As they ingest the plastic, the fear is that these polypeptides are working their way up the food chain. As a result, they may even be finding their way to our dinner tables in the tissue of tuna, mahi mahi and other culinary favorites. Early research suggests that degraded plastics create chemicals that mimic estradiol (a sex hormone). Agents such as bisphenol A, commonly abbreviated as BPA, and a whole gamut of other harmful synthetic polymers contained in plastics have been shown to interfere with critical aspects of metabolic activity in humans.

Challenges to cleaning up the growing mass of plastics in the world's oceans are many, including the great distance from land, the nebulous nature of this slurry and seasonal rough seas. Despite these setbacks, scientists and environmental groups have proposed a variety of solutions. An obvious solution in the minds of some environmentalists is banning disposable plastic bags and creating awareness about superfluous packaging.

"The best way to stop this problem is to refuse plastics when offered," says Daniella Russo, executive director and co-founder of the Plastic Pollution Coalition (PPC). In the end, there are those tasked with cleaning up this mess of epic proportions, and to that we have to look to governmental agencies like the National Oceanic and Atmospheric Administration (NOAA) to take the lead.

There is also the more strategic and personal means of proactive resolution. We have to collectively reduce our "plastic footprint." We know that from looking at our landfills. Now we know that from sailing our seas.

What Divers Can Do


 
Left to right: James Leichter, Miriam Goldstein and Doug Woodring display the debris recovered during Project Kaisei’s SEAPLEX expedition to the Eastern Pacific
Garbage Patch.
The magnitude of the plastic problem may leave many divers feeling helpless; however, small steps to reduce plastic waste do help. Here are some tips:

Switch bags
Make plastic use a conscious decision. Look around: Everything from apples to CDs to individual slices of cheese comes wrapped in plastic. Whenever possible, choose plastic alternatives or reusable options; that includes paper bags and reusable cloth grocery bags. Unless absolutely necessary, skip the plastic produce bags. If you must use a disposable plastic item, make sure you recycle the plastic. Many grocery stores have a recycling bin for plastic bags.

Replace bottles
Bring your own aluminum or steel water bottle to the office, gym or when you travel. If you do need to purchase bottled water, be sure to recycle the bottle.

Request a "for-here" cup
Coffee bars are usually set up to dispense your java in paper cups with plastic lids. If you're not on the run, ask that yours be served in a ceramic mug. If you are on the run, bring your own reusable mug.

Get involved
Educate yourself, and share what you learn with friends, starting with your own tips on how to reduce plastic waste. Post your ideas here.  Sign up to receive more information about our oceans, and opportunities to help at:
Imaging Foundation - Sea Save.
 
and

 
Join Imaging Foundation Facebook Page and Causes

 
 
Who’s Doing What?


PLASTIC Pollution Coalition
The coalition provides a platform for individuals and institutions to share resources and coordinate efforts, explore synergies and strategize together to reduce plastic pollution.
Visit: plasticpollutioncoalition for more information.  

Algalita Marine Research Foundation
Capt. Charles Moore, the man credited with discovering the Eastern Pacific Garbage Patch, founded the Algalita Marine Research Foundation with the goal of protecting the marine environment through research and education. The foundation has released an educational DVD series titled The Synthetic Sea Story; it traces the history of research on plastic debris in the world's oceans. Visit http://www.algalita.org/index.php Algalita Web Site for more information.

NOAA
Focused on removal operations, the National Oceanic and Atmospheric Administration (NOAA) is working to use oceanographic information to help predict the areas of convergence where debris likely concentrates. A better understanding of these processes will provide enough confidence forcost-effective, successful cleanup efforts. For additional information visit NOAA.

Dive Into Your Imagination
Dive Into Your Imagination is changing the way a new generation views oceans. During a recent SEAPLEX expedition for Project Kaisei, founder Annie Crawley helped document the North Pacific Gyre and has created an excellent online blog on the science of the garbage patch.
Visit Dive into Your Imagination for more information.

Sunday, June 6, 2010

Slavery and Shark Finning - Diabolical Partnership

Costa Rica has announced it will prosecute the owners of two Taiwanese fishing vessels from which they rescued 36 Asian crew members, including 15 Vietnamese, from slavery last month. The information was posted online by the Overseas Labor Administration of Vietnam’s Ministry of Labor, War Invalids and Social Affairs, which was quoting a statement from the Vietnamese embassy in Panama on Friday.

The embassy says it has completed the procedures for repatriating the 15 Vietnamese sailors as well as six compatriots who had fled from the boats off the city of Puntarenas last May. The six escapees had done menial work onshore until this March, when they’d asked the local authorities to get word of their and the fellows’ plight. They said they had worked in harsh conditions on the Yulon 70 since April 14 last year.

After the complaint was lodged, police raided the two boats and rescued the enslaved Vietnamese, Indonesian, Filipino, Taiwanese and Chinese fishermen. San Jose officials said the crewmen had been forced to work 20 hours a day, and had often been starved and beaten.

The men said they’d been promised US$250 a month in their employment contracts, of which they would keep $20 and the rest would be sent to their families, but they had received nothing.

FROM THANH NEIN NEWS

Tuesday, June 1, 2010

Two New Shrimp Discovered at Cocos Island


Two new species of transparent mini-shrimp were discovered by scientists at the University of Costa Rica (UCR) in the waters off Cocos Island, 532 km from Puntarenas. These microscopic organisms-only 1.5 millimeters long, are at the base of the food chain of marine ecosystems. Both belong to a subclass of animals called copepods.
Alvaro Morales, the Center for Research in Marine Sciences and Limnology (Cimar) at UCR, said: “Copepods are microscopic but vital in the ocean.” The specialist explained that the larvae of commercially important species such as sardines, snappers and sea bass, and echinoderms-starfish-and even whales feed on copepods. “Without them, the oceans would be sick”.

The first discovered species of shrimp was called Symbazoma Cocoense . This crustacean measures just 1.4 mm long (similar to the thickness of a coin) and at its widest part measures 0.3 millimeters. “It’s a reef mini0shrimp rather elongated with two short antennae,” explained Morales, who studied females of this species in the CIMAR.

The species Cymbasoma cocoense is also characterized by having a carapace. This means that the chest and head are fused into one piece, that’s where you put the two eyes.
Having two eyes appears to be a novelty, but in fact it is because it is not common in this subclass. “There are many individuals of these species that have no eyes or have only one of them,” said the UCR specialist.

The carapace is also where the legs are attached. These tips are those that give the appearance of shrimp, such as those commonly known. The second species that was discovered was Monstrillopsis . Only adult male animals were analyzed. “This the first time that this genus of marine animals (Monstrillopsis) has been recorded in the country,” concluded the researcher. The animal is even smaller than the one described above, but it has long antennae. It measures 1.4 millimeters in length and about 0.2 millimeters at its widest part. “This species is less transparent or translucent than the other, which could be associated with different habits of life among them,” said Morales.
According to the biologist, this is likely to be because the coral colony inhabited by the species is darker, which means the animal needs to “get” darker to blend with the environment and at least make it difficult for attacks on their predators.

Like the previous species, this also has cephalothorax. Experts estimate that the life cycle of both animals and copepods is very short and lasts, at most, about 30 days.
by ALEJANDRA VARGAS M